2020320312161 has 2 divisors, whose sum is σ = 2020320312162. Its totient is φ = 2020320312160.

The previous prime is 2020320312121. The next prime is 2020320312301. The reversal of 2020320312161 is 1612130230202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1796940250000 + 223380062161 = 1340500^2 + 472631^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020320312161 - 2⁶ = 2020320312097 is a prime.

It is not a weakly prime, because it can be changed into another prime (2020320312121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010160156080 + 1010160156081.

It is an arithmetic number, because the mean of its divisors is an integer number (1010160156081).

Almost surely, 2^{2020320312161} is an apocalyptic number.

It is an amenable number.

2020320312161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020320312161 is an equidigital number, since it uses as much as digits as its factorization.

2020320312161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2020320312161 its reverse (1612130230202), we get a palindrome (3632450542363).

The spelling of 2020320312161 in words is "two trillion, twenty billion, three hundred twenty million, three hundred twelve thousand, one hundred sixty-one".